mirror of
https://github.com/cc65/cc65.git
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409 lines
8.7 KiB
C
409 lines
8.7 KiB
C
/*****************************************************************************/
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/* */
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/* handler.c */
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/* */
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/* Opcode handler functions for the disassembler */
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/* */
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/* */
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/* */
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/* (C) 2000 Ullrich von Bassewitz */
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/* Wacholderweg 14 */
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/* D-70597 Stuttgart */
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/* EMail: uz@musoftware.de */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#include <stdarg.h>
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/* common */
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#include "xsprintf.h"
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/* da65 */
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#include "attrtab.h"
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#include "code.h"
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#include "error.h"
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#include "global.h"
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#include "opctable.h"
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#include "output.h"
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#include "handler.h"
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/*****************************************************************************/
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/* Helper functions */
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/*****************************************************************************/
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static void Mnemonic (const char* M)
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/* Indent and output a mnemonic */
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{
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Indent (MIndent);
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Output ("%s", M);
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}
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static void OneLine (const OpcDesc* D, const char* Arg, ...) attribute ((format(printf, 2, 3)));
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static void OneLine (const OpcDesc* D, const char* Arg, ...)
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/* Output one line with the given mnemonic and argument */
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{
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char Buf [256];
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va_list ap;
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/* Mnemonic */
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Mnemonic (D->Mnemo);
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/* Argument */
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va_start (ap, Arg);
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xvsprintf (Buf, sizeof (Buf), Arg, ap);
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va_end (ap);
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Indent (AIndent);
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Output (Buf);
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/* Add the code stuff as comment */
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LineComment (PC, D->Size);
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/* End the line */
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LineFeed ();
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}
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static const char* GetAddrArg (const OpcDesc* D, unsigned Addr)
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/* Return an address argument - a label if we have one, or the address itself */
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{
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const char* Label = 0;
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if (D->LabelFlag & lfUseLabel) {
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Label = GetLabel (Addr);
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}
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if (Label) {
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return Label;
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} else {
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static char Buf [32];
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if (Addr < 0x100) {
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xsprintf (Buf, sizeof (Buf), "$%02X", Addr);
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} else {
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xsprintf (Buf, sizeof (Buf), "$%04X", Addr);
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}
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return Buf;
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}
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}
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static void GenerateLabel (const OpcDesc* D, unsigned Addr)
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/* Generate a label in pass one if requested */
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{
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if (Pass == 1 && !HaveLabel (Addr)) {
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if ((D->LabelFlag & lfGenLabel) != 0 ||
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((D->LabelFlag & lfUseLabel) != 0 && Addr >= CodeStart && Addr <= CodeEnd)) {
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AddLabel (Addr, atIntLabel, MakeLabelName (Addr));
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}
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}
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}
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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void OH_Accumulator (const OpcDesc* D)
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{
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OneLine (D, "a");
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}
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void OH_Implicit (const OpcDesc* D)
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{
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Mnemonic (D->Mnemo);
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LineComment (PC, D->Size);
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LineFeed ();
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}
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void OH_Immidiate (const OpcDesc* D)
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{
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OneLine (D, "#$%02X", GetCodeByte (PC+1));
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}
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void OH_Direct (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeByte (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D, Addr);
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/* Output the line */
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OneLine (D, "%s", GetAddrArg (D, Addr));
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}
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void OH_DirectX (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeByte (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D, Addr);
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/* Output the line */
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OneLine (D, "%s,y", GetAddrArg (D, Addr));
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}
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void OH_DirectY (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeByte (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D, Addr);
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/* Output the line */
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OneLine (D, "%s,y", GetAddrArg (D, Addr));
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}
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void OH_Absolute (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeWord (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D, Addr);
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/* Output the line */
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OneLine (D, "%s", GetAddrArg (D, Addr));
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}
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void OH_AbsoluteX (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeWord (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D, Addr);
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/* Output the line */
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OneLine (D, "%s,x", GetAddrArg (D, Addr));
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}
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void OH_AbsoluteY (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeWord (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D, Addr);
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/* Output the line */
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OneLine (D, "%s,y", GetAddrArg (D, Addr));
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}
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void OH_AbsoluteLong (const OpcDesc* D)
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{
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Error ("Not implemented");
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}
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void OH_AbsoluteLongX (const OpcDesc* D)
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{
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Error ("Not implemented");
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}
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void OH_Relative (const OpcDesc* D)
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{
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/* Get the operand */
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signed char Offs = GetCodeByte (PC+1);
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/* Calculate the target address */
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unsigned Addr = (unsigned) (((int) PC+2) + Offs);
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/* Generate a label in pass 1 */
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GenerateLabel (D, Addr);
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/* Output the line */
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OneLine (D, "%s", GetAddrArg (D, Addr));
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}
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void OH_RelativeLong (const OpcDesc* D)
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{
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Error ("Not implemented");
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}
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void OH_DirectIndirect (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeByte (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D, Addr);
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/* Output the line */
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OneLine (D, "(%s)", GetAddrArg (D, Addr));
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}
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void OH_DirectIndirectY (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeByte (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D, Addr);
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/* Output the line */
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OneLine (D, "(%s),y", GetAddrArg (D, Addr));
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}
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void OH_DirectXIndirect (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeByte (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D, Addr);
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/* Output the line */
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OneLine (D, "(%s,x)", GetAddrArg (D, Addr));
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}
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void OH_AbsoluteIndirect (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeWord (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D, Addr);
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/* Output the line */
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OneLine (D, "(%s)", GetAddrArg (D, Addr));
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}
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void OH_StackRelative (const OpcDesc* D)
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{
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Error ("Not implemented");
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}
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void OH_DirectIndirectLongX (const OpcDesc* D)
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{
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Error ("Not implemented");
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}
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void OH_StackRelativeIndirectY (const OpcDesc* D)
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{
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Error ("Not implemented");
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}
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void OH_DirectIndirectLong (const OpcDesc* D)
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{
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Error ("Not implemented");
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}
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void OH_DirectIndirectLongY (const OpcDesc* D)
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{
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Error ("Not implemented");
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}
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void OH_BlockMove (const OpcDesc* D)
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{
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Error ("Not implemented");
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}
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void OH_AbsoluteXIndirect (const OpcDesc* D)
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{
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Error ("Not implemented");
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}
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void OH_Rts (const OpcDesc* D)
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{
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OH_Implicit (D);
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SeparatorLine();
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}
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void OH_JmpAbsolute (const OpcDesc* D)
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{
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OH_Absolute (D);
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SeparatorLine ();
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}
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void OH_JmpAbsoluteIndirect (const OpcDesc* D)
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{
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OH_AbsoluteIndirect (D);
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SeparatorLine ();
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}
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